<template>
  <div>
    <!--   面包屑导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
<!--      2.为echarts准备一个具备大小的dom-->
      <div id="main" style="width: 750px;height:400px;"></div>
    </el-card>
  </div>
</template>

<script>
//1.
import * as echarts from 'echarts';
import _ from 'lodash'
export default {
  name: "Report",
  data(){
    return{
     // 需要合并的数据
      option: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
    }
  },
  //此时页面上的元素已经被渲染完毕了
  mounted() {
    // 3.基于准备好的dom，初始化echarts实例
    let myChart = echarts.init(document.getElementById('main'));

    this.$http.get('reports/type/1').then(({data:res})=>{
      if (res.meta.status!==200) return this.$message.error('获取折线图数据失败')
      //  4.准备数据和配置项
      const result=_.merge(res.data,this.option)
      //  5.展示数据
      myChart.setOption(result)
    })


  }
}
</script>

<style scoped>

</style>
